作业帮It___ten years since he left the army.A.is B.has C.will D.was 这题应该怎么选?
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It___ten years since he left the army.A.is B.has C.will D.was 这题应该怎么选?
It___ten years since he left the army.A.is B.has C.will D.was 这题应该怎么选?
It___ten years since he left the army.A.is B.has C.will D.was 这题应该怎么选?
正确答案是A,这里也可以填has been.is比较口语化,而填has been比较正式一点,因为句子中有since引导一个过去时的句子,主句应该用现在完成时.两者都是正确的,可以互相转换.该句子可以做如下转换：
He left the army ten years ago.
=It has been ten years since he left the army.
=It is ten years since he left the army.
=Ten years has passed since he left the army.
支持楼上的说法。
这题的答案应该要填入 has been，可是不在选项内。可以去挑战老师，题目有误。
(A) has been 在这里可用is 代替
It___ten years since he left the army.A.is B.has C.will D.was
It___ten years since he left the army.A.is B.has C.will D.was 这题应该怎么选?
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